PLANET EARTH Ice Worlds

Once an extremely rare sight polar bears have recently been seen over sixty miles from the shore. There is now no turning back for this bear. He's forced to head out into deeper water. His giant front paws help him to fight the ocean currents. He seems at home in the sea but he cannot swim indefinitely. He will drown if he doesn't find land somewhere in this vast ocean.



Walruses（海象） are now gathering on low lying islands. They gave birth on sea ice but with this platform now gone, they need a new place to haul out and nurse their young. After several days at sea the male bear finally makes landfall drawn by pungent（辛辣的） smells emanating（从xxx传出来） from the island. By the end of summer the bear has lost half his weight. With the ice long gone he is forced onto land in search of food. There will be no easy meals on this island. Walruses are the largest seals in the world. They weight over a ton and are armed with tusks（长牙） a meter long. Exhausted from his swim the bear must regain his strength.